Sump pump



July 23, 1929. R. H. CARSON SUMP PUMP Filed March 29, 1926 lzw zzibrsEwe/7'17 (arao z fiy-W w? Patented July 23, 1929.

UNITED STATES ROBERT H. CARSON, OF DANVILLE, ILLINOIS.

SUMP PUMP.

Application filed March 29, 1926. Serial No. 98,210.

This invention relates to an improved portable sump or puddle pump ofthe general type of construction shown in my Patent No. 1382605. issuedJune 21, 1921, and is chiefly characterized by a bell shaped basecomprising a suction inlet, which is adapted to be set directly intoshallow puddles of water, so that substantially all of the fluid may bedrawn up.

I-leretofore, sump pumps usually were provided with a suction hosehaving a screen on the end. The shallowest depth that could be pumpedwas limited by the diameter of the screen. Accordingly, sump holes wereusually dug to receive the end of the suction line, which is especiallyundesirable in concrete floors and the like. Also the flexible hose woreout quickly and was a cumbersome appendage to the pump.

The objects of my inventiongaie to over- :ome such disadvantages asmentioned above; and to provide a compact portable pumping device, whichmay be set directly on flat surfaces and will suck up practically all of2 the water or fluid thereon.

An illustrative embodiment of this invention is shown in theaccompanying drawings, in which:

Figure 1 is an elevation of the portable pump, with portions shown insection.

Fig. 2 is a section on the line 2-2 of Figure 1.

Fig. 3 is taken on the line 33 of Figure 1.

The portable pump comprises an upright structure in which the motor andcentrifugal pump are centrally mounted on a vertical shaft. The base ofthe structure is hollowed out and the inlet to the pump communicatesdirectly to the hollow cavity in the base.

In the'drawings, the lower half 1 of the pump housing 2 comprises thebottom frame member 3. The pump housingv is of an invertedfrusto-conical form and opens directly into the inverted cup-shaped baseportion 4. The upper member 5 of the pump housing is substantially flatand is provided with a central hub 6, a packing gland 7 and an upwardlyextending integral outlet communicative with the interior of the pumhousing 2 at the periphery thereof. X skeleton frame 8 is bolted to thepump housing and supports the cylindrical housing 9 which contains thedriving motor 10. The vertical shaft 11 is rotatably mounted in the boss6 and housing 9, and carries the armature of the motor 10. At the lowerend of the shaft, and located in the pump housing, is the pump rotor 12.The rotor 12 conforms to the shape of the housing, and is provided witha hollow sleeve 13 at the bottom, which projects through the housing andinto the recess or cavity 14 in the base 4. The bottom of the base iscovered with a screen 15, and side ports 16 are provided around theedges. r

The pick-up blade or screw 17 is secured in the sleeve 13 and serves todraw the fluid up into the interior of the rotor 12 to initiate thesuction. A curved vane 18 is provided across the interior of the rotor12, and outlet ports 19 are cut in the periphery.

It is manifest that an extremely compact unit is provided. It easilytransported and may be set directly into the shallow puddles of water.No sump holes or drains are required.

Formerly the blade 18 was made straight, but I have found that bycurving the blade as shown the efficiency of the pumping is increased.For distributing the flow of the fluid arouml'the periphery of therotor, the first of the series of ports 19, adjacent the outer end ofthe blade 18, is made smaller than the rest of the ports which aresuccessively increased in size around the rotor.

Although but one specific embodiment of this invention has been hereinshown and described. it will be understood that numerous details of theconstruction shown may be altered or omitted without departing from thespirit of this invention as defined by the following claims.

I claim:

1. In a centrifugal pump, a hollow inverted frusto-conical rotor turningon a vertical axis, and a housing enclosing and conforming to saidrotor, a hollow inverted cup-shaped base joined to said housing. saidhousing having a fiat up )er wall and an outlet opening upwardlytherefrom and arranged to avoid air pockets, a tube portion on the rotorprojecting through the lower end of the housing to form an inlet, andsaid rotor having peripheral apertures.

2. In a centrifugal pump, a hollow rotor turning on a central axis, ahousing for the rotor. said housing having a peripheral outlet, a hollowhub on the rotor projecting through the housing, and a single curvedvane in the rotor. the periphery of the rotor havin a series of portstherein.

3. X centrifugal pump including a housing, a hollow rotor in thehousing, and a rotor, said blade being curved at the outer single radialblade across the interior of the end, the edge of the rotor beingprovided 10 rotor, said blade being curved at the outer with a series ofports successively increasing end, the periphery of the rotor having ain size from the first port adjacent the outer 5 series ofports'therein. end of the blade.

4. A centrifugal pump including a hous- Signed at Chicago this 25th dayof ing, a hollow rotor in the housing, and a March, 1926. single radialblade across the interior of the ROBERT H. CARSON.

